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([206.237.119.150]) by smtp.gmail.com with ESMTPSA id 98e67ed59e1d1-2e1bfb1787asm275548a91.21.2024.10.02.19.33.41 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 02 Oct 2024 19:33:44 -0700 (PDT) From: clingfei To: drew@pdp7.com, guoren@kernel.org, wefu@redhat.com, linus.walleij@linaro.org Cc: linux-riscv@lists.infradead.org, linux-gpio@vger.kernel.org, linux-kernel@vger.kernel.org, clf700383@gmail.com Subject: [PATCH] pinctrl: fix Null pointer dereference Date: Thu, 3 Oct 2024 10:33:07 +0800 Message-Id: <20241003023307.2138695-1-clf700383@gmail.com> X-Mailer: git-send-email 2.34.1 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" pinmux_generic_get_function may returns NULL, and its retval is dereferenced without check, which will cause a null pointer dereference. Signed-off-by: clingfei Reviewed-by: Drew Fustini --- drivers/pinctrl/pinctrl-th1520.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/drivers/pinctrl/pinctrl-th1520.c b/drivers/pinctrl/pinctrl-th1= 520.c index 1bb78b212fd5..9331f4462480 100644 --- a/drivers/pinctrl/pinctrl-th1520.c +++ b/drivers/pinctrl/pinctrl-th1520.c @@ -798,6 +798,8 @@ static int th1520_pinmux_set_mux(struct pinctrl_dev *pc= tldev, struct th1520_pinctrl *thp =3D pinctrl_dev_get_drvdata(pctldev); const struct function_desc *func =3D pinmux_generic_get_function(pctldev,= fsel); =20 + if (!func) + return -EINVAL; return th1520_pinmux_set(thp, thp->desc.pins[gsel].number, (uintptr_t)thp->desc.pins[gsel].drv_data & TH1520_PAD_MUXDATA, (uintptr_t)func->data); --=20 2.34.1